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OK,GMC/GM are wired as such. White/Black wire, front left -[neg] White, front left +[pos]. Grey/Black wire, front rt -[neg], Grey wire, front rt +[pos]....Green/Black wire, left rear [neg], Green, left rear [pos]....Violet/,Black , Rt rear [neg],...Violet, Rt.rear [pos]........You will also have a Blue/Red wire that goes to antenna. ..A Blue wire for Power Remote....Red goes to IGNITION.....Yellow goes to Battery[for clock].....And finally a Black goes to Ground.......I hope that you have good luck and everything works out for you. `
I am going to assume the 2 speakers in the sub are each 4 ohm loads, and are wired together in parallel, creating a 2 ohm load. And your amp pushes 800W at a 2 ohm load. And actually goes down to 1 ohm/1100W. Anyway...
Seems you want to lessen the wattage output of the amp by making a 4 ohm load. To do that, you need to wire the both 2 ohm speakers in SERIES. In general wiring principles, to wire in SERIES, take the POS terminal from the amp and wire to the POS terminal of first speaker. Take the NEG terminal from the amp and wire to the 2nd speakers' NEG terminal. Then place a "jumper" piece of speaker wire to connect 1st speakers' NEG terminal to 2nd speakers' POS terminal. Now you have a 4 ohm load, and will be pushing 450W from your amp.
You will need slide connectors any hardware store will have them.Your speaker wires,have one with a stripe that one goes on the side with a +(pos.) the other goes on the -(neg.).
If you do not have speaker wire at the place you are mounting the speaker,I need to know what kind and how big(watts) is your amp,the make and model of the ride,do you have a preamp,type of cross overs,and what cd player or changer you are using.
The sub works but the speakers don't? Do you hook up the speakers to the subwoofer output "loop"? This is a circuit issue when it works and stops working. I have the same issue so I wound up joining the wires that go to the sub and the wires that go to the speaker together and place those connections into the sub. The sub works, the satellite speaker works and the impedance load is no issue for my system. Confused? Simply run your neg/pos wire to the sub and where it connects to the sub, run another cable to the speaker (pos to pos., neg to neg).
The only way to repair it would be to deal with component level repair. Although I have the experience, it is too petty and it works fine the way it is.
Basic wiring dictates that with a speaker with 4 voice coils all at 4 ohms each is meant to be wired in parallel. This will put the load at a 1 ohm total load on the amplifier. Wiring in parallel is positive out from amp to pos. to pos. to pos. to pos.. And neg. out from amp to neg., to neg., to neg., to neg..
All depends on your amp. Is it 1 ohm stable or not? Parralell: positive (pos) on voice coil 1 (vc1) to Pos on vc2 and negative (neg) on vc1 to neg on vc2. Then speaker wire from amp to one vc only = 1ohm load. Series: Pos from amp to Pos on vc1. Neg of vc1 to Pos of vc2. Neg of vc2 to amp = 4 ohm load.